JP3971585B2 - Body fluid absorbent sheet and body fluid absorbent article - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bodily fluid absorption sheet and a bodily fluid absorbent article that absorb and retain bodily fluids .
[0002]
[Prior art]
In JP-A-8-196559, a liquid-absorbent core having a fiber assembly layer placed on top of a liquid-retaining layer in which pulverized pulp and highly water-absorbing polymer particles are mixed has a liquid-permeable surface sheet and a liquid-impervious property. Disposable diapers interposed between the back sheet and the back sheet are disclosed.
[0003]
In the core, the liquid retaining layer and the fiber aggregate layer are integrally covered with the tissue paper, and substantially the entire area of the overlapping surface of the liquid retaining layer and the fiber aggregate layer is intermittently fixed, and the layers and the tissue paper are mutually adhered. Almost the entire area of the overlapping surface is fixed intermittently. Even if the diaper is bent or twisted, the diaper can maintain a close contact state between the liquid retaining layer and the fiber assembly layer and the tissue paper, and can be obtained by using a large amount of superabsorbent polymer particles. It has an effect that the liquid retaining layer which has poor flexibility and can be easily loosened can be prevented from being deformed.
[0004]
[Problems to be solved by the invention]
In the diaper disclosed in the publication, when the tissue paper is damaged while the diaper is worn, the contact state between the liquid retaining layer and the tissue paper is released, and the liquid retaining layer may lose its shape. Once the liquid retaining layer is deformed, it does not return to its original state. Moreover, in order to fully exhibit the core original function of absorbing and holding body fluid, it is preferable that the core is formed only from the liquid retaining layer. However, in this diaper, the liquid retentive layer itself does not have a means for preventing its deformation, and a fiber assembly layer and tissue paper must be used to prevent the deformation, A core cannot be formed from layers alone.
[0005]
An object of the present invention is to provide a bodily fluid-absorbing sheet and a bodily fluid-absorbing article that do not themselves lose shape and do not need to use other members to prevent the loss of shape.
[0006]
[Means for Solving the Problems]
The premise of the present invention for solving the above problems is that the surface is sandwiched between a liquid-permeable surface sheet located on the skin contact side and a liquid-impermeable back sheet located on the skin non-contact side, It is a bodily fluid absorbent sheet which comprises a bodily fluid absorbent article with a sheet | seat and the said back surface sheet .
[0007]
A first aspect of the present invention in the premise, the body fluid absorbent sheet, in one of the cloth-like the knitting rarely been knitted with woven was fabric or the first blended yarn in a net-like first blended yarn I Oh, the first blended yarn, which superabsorbent polymer particles in the first fibrous material is bonded, the first fiber material is to consist of synthetic fibers and / or regenerated fibers.
[0008]
The second aspect of the present invention in the premise, the body fluid absorbent sheet, in one of the cloth-like the knitting rarely been knitted with woven was fabric or the second blended yarn in a net-like in the second blended yarn I Oh, the second blended yarn, which was blended with the second fiber material and superabsorbent fibers, the second fiber material made of synthetic fibers and / or regenerated fibers, wherein the superabsorbent fiber However, it is that a superabsorbent polymer is spun .
[0009]
The present invention has the following embodiments.
(1) The superabsorbent polymer particles are mixed in the first fiber material .
(2) The superabsorbent polymer particles are fixed to the peripheral surface of the first fiber material using an adhesive.
(3) The highly water-absorbing polymer particles are attached to the peripheral surface of the first fiber material using its own adhesiveness.
(4) The content of the superabsorbent polymer particles with respect to the first blended yarn is in the range of 30 to 60% by weight.
(5) The blend rate of the superabsorbent fiber with respect to the second blended yarn is in the range of 30 to 50% by weight, and the fineness of the superabsorbent fiber is in the range of 1.5 to 100 dtex.
(6) The fineness of the fiber material is in the range of 1.5 to 100 dtex, and the number of fibers in the first and second mixed yarns is in the range of 20 to 800.
(7) The synthetic fiber is formed of at least one of polyolefin fiber, polyester fiber, and polyamide fiber, and the regenerated fiber is formed of cellulosic fiber.
The present invention includes a liquid-permeable surface sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and a body fluid absorbing sheet interposed between the surface sheet and the back sheet. Also includes a body fluid absorbent article. The body fluid absorbent article may include at least two layers of the body fluid absorbent sheet overlapping in the thickness direction .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
With reference to the accompanying drawings, the details of the body fluid absorbent article using a such body fluid absorbing sheet it to the present invention, will be described as an example a disposable diaper and a sanitary napkin open- type, is as follows.
[0011]
1 and 2 are a partially broken perspective view of the disposable diaper 1 shown from the side of the top sheet 2 and a perspective view of the bodily fluid absorbing sheet 4, and FIGS. 3 and 4 are mixed yarns 7 a forming the bodily fluid absorbing sheet 4. These are a perspective view and an enlarged perspective view of the synthetic fiber 8 shown as a single body. FIG. 5 is a perspective view of a blended yarn 7b shown as another example. In FIG. 1, the horizontal direction is indicated by an arrow X, and the vertical direction is indicated by an arrow Y. The inner surface of the top sheet 2 and the back sheet 3 refers to the surface facing the body fluid absorbing sheet 4, and the outer surface of the sheets 2 and 3 refers to the surface not facing the body fluid absorbing sheet 4.
[0012]
The diaper 1 includes a liquid-permeable front sheet 2 positioned on the skin contact side, a liquid-impermeable back sheet 3 positioned on the skin non-contact side, a body fluid absorbing sheet 4 interposed between the sheets 2 and 3, and The fiber assembly 5 is comprised. The fiber assembly 5 is located on the upper part of the body fluid absorbing sheet 4. In addition to them, the diaper 1 has a substantially liquid-impervious leak-proof cuff 6 that is located on the outer surface of the topsheet 2 and extends in the longitudinal direction.
[0013]
The diaper 1 includes a front waistline region 15 and a rear waistline region 17 in the vertical direction, and a crotch region 16 positioned between the front and back waistline regions 15, 17. The diaper 1 extends in the lateral direction. Both end edges 1a extending and both side edges 1b extending in the vertical direction are provided. Both side edge portions 1 b form an arc in the crotch region 16 inward in the lateral direction of the diaper 1.
[0014]
The body fluid absorbing sheet 4 is fixed to the inner surface of the back sheet 3. The fiber assembly 5 is fixed to the inner surface of the top sheet 2. The body fluid-absorbing sheet 4 and the fiber assembly 5 have their overlapping portions fixed to each other.
[0015]
The body fluid absorbing sheet 4 is a net-like woven fabric formed from a blended yarn 7a obtained by blending synthetic fibers 8 and regenerated fibers 9, and made by weaving the blended yarn 7a. As shown in FIG. 4, the superabsorbent polymer particles 18 are mixed in the synthetic fiber 8. The synthetic fiber 8 can be obtained by mixing the superabsorbent polymer particles 18 in a molten thermoplastic synthetic resin and spinning it.
[0016]
The synthetic fiber 8 is formed from a polyolefin fiber. As the polyolefin fiber, at least one of a polypropylene fiber and a polyethylene fiber can be used. As the polyolefin fiber, a core-sheath type composite fiber, a parallel type composite fiber, or a sea-island type composite fiber made of polyethylene / polypropylene can be used. Moreover, a hollow fiber and a modified cross-section fiber can also be used for a polyolefin-type fiber.
[0017]
As the synthetic fiber 8, in addition to polyolefin fibers, polyester fibers and polyamide fibers can be used. The synthetic fiber 8 may be a mixture of at least two kinds of fibers selected from polyolefin fibers, polyester fibers, and polyamide fibers. As the regenerated fiber 9, a cellulose fiber made of rayon or acetate can be used.
[0018]
The highly water-absorbing polymer particles 18 include starch-acrylonitrile graft copolymer hydrolyzate, starch-based water-absorbing resin that is neutralized starch-acrylic acid graft copolymer, and vinyl acetate-acrylate copolymer. Saponified products, partially neutralized polyacrylic acid, and a polymer of a maleic anhydride-isobutylene copolymer and a water-soluble ethylenically unsaturated monomer can be used. The superabsorbent polymer particles 18 may be mixed not only in the synthetic fiber 8 but also in the regenerated fiber 9 or may be mixed only in the regenerated fiber 9.
[0019]
The fiber aggregate 5 prevents the discomfort that the body fluid absorbing sheet 4 gives to the wearer's skin, and functions as a cushion. The fiber aggregate 5 is a mixture obtained by mixing regenerated fibers and pulverized pulp, or a mixture obtained by mixing synthetic fibers, regenerated fibers and pulverized pulp, and is compressed to a given thickness.
[0020]
The blended yarn 7b in FIG. 5 is a blend of synthetic fiber 8 and recycled fiber 9, and superabsorbent polymer particles 18 are fixed to the peripheral surfaces of the fibers 8 and 9 using an adhesive (not shown). Has been. As the adhesive, a hot-melt adhesive or an ethylene-glycidyl (meth) acrylate copolymer described later can be used.
[0021]
In the blended yarn 7b of FIG. 5, the superabsorbent polymer particles 18 may adhere to the peripheral surfaces of the fibers 8 and 9 by utilizing their own adhesiveness. In this case, water may be added to the superabsorbent polymer particles 18 to adhere to the peripheral surfaces of the fibers 8 and 9, and then the superabsorbent polymer particles 18 may be dried. In the blended yarn 7b of FIG. 5, the superabsorbent polymer particles 18 need only adhere to at least one of the synthetic fiber 8 and the regenerated fiber 9.
[0022]
The content of the superabsorbent polymer particles 18 with respect to the blended yarns 7a and 7b is preferably in the range of 30 to 60% by weight. When the content of the superabsorbent polymer particles 18 is less than 30% by weight, the body fluid absorbing function of the body fluid absorbing sheet 4 is deteriorated. In the blended yarn 7a in which the superabsorbent polymer particles 18 are mixed into the synthetic fiber 8, when the content of the superabsorbent polymer particles 18 exceeds 60% by weight, the strength of the fiber 8 decreases when the fiber 8 is wet. May not be able to retain its form. In the blended yarn 7b in which the superabsorbent polymer particles 18 are fixed to the peripheral surfaces of the synthetic fiber 8 and the regenerated fiber 9, when the content of the superabsorbent polymer particles 18 exceeds 60% by weight, it absorbs moisture and swells. The superabsorbent polymer particles 18 can easily form a gel block, and the superabsorbent polymer particles 18 that have formed the gel block may interfere with the diffusion and absorption of the body fluid in the body fluid absorbing sheet 4.
[0023]
In the body fluid absorbing sheet 4, the fineness of the synthetic fiber 8 and the regenerated fiber 9 is preferably in the range of 1.5 to 100 dtex. If the fineness of the fibers 8 and 9 is less than 1.5 dtex, the strength of the fibers 8 and 9 is reduced and the fibers 8 and 9 are easily damaged. When the fineness of these fibers 8 and 9 exceeds 100 dtex, the rigidity of the blended yarns 7a and 7b increases, and the flexibility of the body fluid absorbing sheet 4 decreases.
[0024]
The number of fibers 8 and 9 in the blended yarns 7a and 7b is preferably in the range of 20 to 800. When the number of the fibers 8 and 9 is less than 20, the body fluid absorbing function of the body fluid absorbing sheet 4 is lowered, and the bending rigidity and the bending back property of the body fluid absorbing sheet 4 are lowered. If the number of the fibers 8 and 9 exceeds 800, the thickness of the blended yarns 7a and 7b itself increases, and the thickness of the body fluid absorbing sheet 4 becomes larger than necessary.
[0025]
A belt-like elastic member 10 around the trunk extending in the lateral direction is attached to both end edges 1a in an extended state. A plurality of leg-around elastic members 11 extending in the vertical direction are attached to both side edges 1b in the crotch region 16 in an extended state.
[0026]
The leak-proof cuff 6 is located in the vicinity of both side edges 1 b and extends from the crotch region 16 toward the front and rear waist regions 15 and 17. The cuff 6 has a fixed edge portion 6a extending in the longitudinal direction in the crotch region 16, a free edge portion 6b having a tendency to stand up above the top sheet 2, and a lateral direction of the diaper 1 positioned in the front and rear waist regions 15 and 16 It has fixed both end portions 6c lying inward. In the cuff 6, the fixed edge portion 6a is fixed to the both side edge portions 1b, and the fixed both end portions 6c are fixed to the both end edge portions 1a.
[0027]
In the cuff 6, a side portion 6d extends laterally outward from the fixed edge portion 6a. An elastic member 12 extending in the vertical direction is attached to the free edge 6b of the cuff 6 in an extended state. The elastic member 12 is covered by a part of the free edge 6b.
[0028]
In the diaper 1, when it is curved in the vertical direction with the top sheet 2 inside, the free edge 6 b of the cuff 6 contracts in the vertical direction along with the contraction of the elastic member 12, and the free edge 6 b becomes the top sheet 2. Stand up. In the diaper 1, the free edge portion 6 b of the standing cuff 6 forms a barrier against body fluid, and leakage of body fluid from the crotch region 16 can be prevented.
[0029]
In the diaper 1, a pair of tape fasteners 13 are attached to both side edges 1 b of the rear waistline region 17, and a rectangular target tape 14 that serves as a fastening region for the tape fastener 13 on the outer surface of the back sheet 3 in the front waistline region 15. Is attached.
[0030]
The tape fastener 13 is formed of a plastic film having flexibility, and includes a base end portion fixed to both side edges 1b of the rear waist region and a free end portion that is detachably fastened to the target tape 14. Have. The tape fastener 13 has a free end coated with an adhesive (not shown), and the free end is temporarily attached to the cuff 6 via the adhesive. The target tape 14 is formed from a flexible plastic film.
[0031]
At both end edges 1a, the end 2a of the top sheet 2 and the end 3a of the back sheet 3 extend outward in the vertical direction from both ends of the body fluid absorbing sheet 4, and the overlapping portions of the ends 2a and 3a are fixed. Has been. The fixed both ends 6 c of the cuff 6 are fixed to the end 2 a of the top sheet 2. The waist elastic member 10 is interposed between the end 2a of the top sheet 2 and the end 3a of the back sheet 3, and is fixed to the ends 2a and 3a.
[0032]
At the side edges 1b, the side 2b of the top sheet 2 slightly extends laterally outward from the side edges of the body fluid absorbing sheet 4 and further laterally outward from the side 2b of the top sheet 2 to the back sheet 3 side. The part 3b and the side part 6d of the cuff 6 extend. The side portion 2b and the side portion 3b are fixed to the overlapping portions of the side portions 2b and 3b. The side portion 3b and the side portion 5d are fixed to the overlapping portions of the side portions 3b and 5d. The fixed edge portion 6 a of the cuff 6 is fixed to the side portion 2 b of the top sheet 2. The leg-around elastic member 11 is interposed between the side portion 3b of the back sheet 3 and the side portion 6d of the cuff 6, and is fixed to the side portions 3b and 6d.
[0033]
In order to wear the diaper 1, the side edges 1 b of the rear waist area 17 are overlapped with the outer sides 1 b of the front waist area 15, and the free end of the tape fastener 13 is attached to the target tape via an adhesive. Fasten to 14. In the diaper 1 to which the front and rear waist areas 15 and 17 are connected, a waist opening and a pair of leg openings are defined.
[0034]
In the diaper 1, bodily fluid absorbent sheet 4 is blended yarns 7a, a fabric made by weaving 7b, blended yarns 7a from which it is formed, so 7b What happened to restrain each other's movements, body fluid absorbent sheet 4 itself hardly cause their shape, in order to prevent their shape of the body fluid absorbent sheet 4, it is not necessary to use a body fluid absorption sheet 4 than the member. In the diaper 1, even when it is bent or kinked, the body fluid absorbing sheet 4 is also freely deformed according to the movement thereof, so that the movement of the diaper 1 is not restricted by the body fluid absorbing sheet 4.
[0035]
In the diaper 1, the body fluid that has passed through the top sheet 2 and the fiber assembly 5 is absorbed and held by the superabsorbent polymer particles 18, so that the body fluid does not return to the top sheet 2 and is applied to the skin of the wearer. Attachment of body fluid can be prevented.
[0036]
6 and 7 are a partially broken perspective view of the sanitary napkin 20 shown from the side of the topsheet 21 and perspective views of the body fluid absorbing sheets 23a and 23b, and FIG. 8 forms the body fluid absorbing sheets 23a and 23b. 3 is a perspective view of a blended yarn 25. FIG. In FIG. 6, the horizontal direction is indicated by an arrow X, and the vertical direction is indicated by an arrow Y.
[0037]
The napkin 20 has a substantially rectangular shape that is long in the vertical direction. The liquid-permeable surface sheet 21 is located on the skin contact side, the liquid-impermeable back sheet 22 is located on the skin non-contact side, and the sheets 21 and 22. It is comprised from the bodily fluid absorption sheet | seat 23a, 23b and the fiber assembly 24 which intervene in between. The fiber assembly 24 is located on the upper part of the body fluid absorbing sheet 23a.
[0038]
In the napkin 20, the two body fluid absorbing sheets 23a and 23b form two layers overlapping in the thickness direction. The body fluid absorbing sheets 23a and 23b are fixed at their overlapping portions. In the napkin 20, the body fluid absorbing sheet 23 b is fixed to the inner surface of the back sheet 22, and the fiber aggregate 24 is fixed to the inner surface of the top sheet 21. The body fluid-absorbing sheet 23a and the fiber assembly 24 are fixed at their overlapping portions.
[0039]
In the napkin 20, the overlapping portions of the topsheet 21 and the backsheet 22 that extend outward in the circumferential direction from the peripheral edges of the body fluid absorbing sheets 23 a and 23 b and the fiber assembly 24 are fixed. An adhesive (not shown) for sticking the napkin 20 to the inside of the shorts is applied to the outer surface of the back sheet 22.
[0040]
As shown in FIG. 8, the body fluid absorbing sheets 23 a and 23 b are formed from a blended yarn 25 in which a synthetic fiber 26 and a superabsorbent fiber 27 are blended, and is a net-like fabric made by weaving the blended yarn 25. is there. The superabsorbent fiber 27 can be obtained by spinning a superabsorbent polymer. Specifically, acrylic acid and a vinyl unsaturated monomer capable of forming fibers are polymerized in an aqueous solution, and a part of the carboxylic acid is neutralized to perform dry spinning. Thereafter, a cross-linking reaction is performed to obtain insolubilized superabsorbent fibers 27. This technique is disclosed in Japanese Patent No. 2613604.
[0041]
The superabsorbent fiber 27 can be obtained by melt spinning an ethylene-glycidyl (meth) acrylate copolymer having a melting point in the range of 50 to 150 ° C. in addition to the one disclosed in Japanese Patent No. 2613604. it can. Here, (meth) acrylate means acrylate and methacrylate.
[0042]
Specific examples of the ethylene-glycidyl (meth) acrylate copolymer include the following. Ethylene-glycidyl acrylate copolymer, ethylene-glycidyl methacrylate copolymer, ethylene-glycidyl acrylate-glycidyl methacrylate copolymer, ethylene-glycidyl acrylate-vinyl acetate copolymer, ethylene-glycidyl acrylate-vinyl acetate-methyl acrylate copolymer Copolymer, ethylene-glycidyl acrylate-methyl methacrylate copolymer, ethylene-glycidyl acrylate-vinyl acetate-methyl methacrylate copolymer, ethylene-glycidyl acrylate-ethyl acrylate copolymer, ethylene-glycidyl acrylate-vinyl acetate-ethyl acrylate copolymer Polymer, ethylene-glycidyl methacrylate-vinyl acetate copolymer, ethylene-glycidyl methacrylate-methyl acrylate Copolymer, ethylene-glycidyl methacrylate-vinyl acetate-methyl acrylate copolymer, ethylene-glycidyl methacrylate-methyl methacrylate copolymer, ethylene-glycidyl methacrylate-vinyl acetate-methyl methacrylate copolymer, ethylene-glycidyl methacrylate-ethyl acrylate A copolymer, an ethylene-glycidyl methacrylate-vinyl acetate-ethyl acrylate copolymer, an ethylene-glycidyl acrylate-glycidyl methacrylate-vinyl acetate copolymer, and an ethylene-glycidyl acrylate-glycidyl methacrylate-methyl acrylate copolymer.
[0043]
In the body fluid absorbing sheets 23a and 23b, the blend ratio of the superabsorbent fiber 27 with respect to the blended yarn 25 is in the range of 30 to 50% by weight, and the fineness of the synthetic fiber 26 and the superabsorbent fiber 27 is in the range of 1.5 to 100 dtex. Preferably there is. When the blend ratio of the superabsorbent fibers 27 is less than 30% by weight, the body fluid absorbing function of the body fluid absorbing sheets 23a and 23b is deteriorated. When the blend rate of the superabsorbent fibers 27 exceeds 50% by weight, the superabsorbent fibers 27 that have become weak due to absorption and swelling of body fluids are separated from the synthetic fibers 26, so that the blends forming the body fluid absorbent sheets 23a and 23b are formed. The yarn 25 is easily loosened. When the fineness of the fibers 26 and 27 is less than 1.5 dtex, the strength of the fibers 26 and 27 is lowered, and thus the superabsorbent fibers 27 are particularly easily broken. When the fineness of the fibers 26 and 27 exceeds 100 dtex, the rigidity of the blended yarn 25 increases, and the flexibility of the body fluid absorbing sheets 23a and 23b decreases.
[0044]
The number of fibers 26 and 27 in the blended yarn 25 is preferably in the range of 20 to 800. When the number of the fibers 26 and 27 is less than 20, the body fluid absorbing function of the body fluid absorbing sheets 23a and 23b, the bending rigidity and the bending return property of the body fluid absorbing sheets 23a and 23b are deteriorated. When the number of the fibers 26 and 27 exceeds 800, the thickness of the blended yarn 25 increases, and the thickness of the body fluid absorbing sheets 23a and 23b becomes necessary.
[0045]
These body fluid absorbing sheets 23a and 23b may be formed from a blended yarn obtained by blending recycled fibers and superabsorbent fibers, or formed from a blended yarn obtained by blending synthetic fibers and recycled fibers and superabsorbent fibers. May be. As the synthetic fiber, the fiber aggregate, and the recycled fiber, those similar to those in FIG. 1 can be used.
[0046]
In the napkin 20, the body fluid that has passed through the top sheet 21 and the fiber assembly 24 is absorbed and held by the superabsorbent fibers 27 that form the body fluid absorbing sheets 23 a and 23 b, so that the body fluid returns to the top sheet 21. No, it is possible to prevent body fluid from adhering to the wearer's skin.
[0047]
The body fluid absorbing sheets 4, 23a and 23b in the illustrated examples are woven fabrics having a net shape, but are not limited to the net shape, and the gap between the adjacent blended yarns 7a, 7b and 25 is substantially invisible. It may be a cloth-like shape. Further, the body fluid absorbing sheets 4, 23a, 23b may be knitted fabrics made by knitting blended yarn in addition to the woven fabric.
[0048]
In the illustrated diaper 1 and the napkin 20, the fiber aggregates 5 and 25 are located above the body fluid absorbing sheets 4, 23a and 23b. Only the body fluid absorbing sheets 4, 23a, 23b may be interposed between the sheets 2, 21 and the back sheets 3, 22. Moreover, two or more body fluid absorption sheets may be attached to the diaper 1 and the napkin 20 in a state of overlapping in the thickness direction.
[0049]
For the topsheets 2 and 21, a hydrophilic fiber nonwoven fabric or a plastic film having a large number of fine holes can be used. For the back sheets 3 and 22, either a hydrophobic fiber nonwoven fabric, a liquid-impervious plastic film, a two-layer nonwoven fabric in which a hydrophobic fiber nonwoven fabric is superimposed, or a composite sheet in which a plastic film is fixed to a hydrophobic fiber nonwoven fabric is used. Can be used. For the leak-proof cuff 6, a hydrophobic fiber nonwoven fabric can be used.
[0050]
For the back sheets 3 and 22 and the leak-proof cuff 6, use is made of a composite nonwoven fabric in which a fiber nonwoven fabric by a melt blown method having high water resistance is sandwiched between fiber nonwoven fabrics by a spunbond method having high strength and high flexibility. You can also.
[0051]
As a nonwoven fabric, what was manufactured by each manufacturing method of a spunlace, a needle punch, a melt blown, a thermal bond, a spun bond, a chemical bond, and an air through can be used. As a constituent fiber of the nonwoven fabric, polyolefin-based, polyester-based, polyamide-based fibers, polyethylene / polypropylene, or core-sheath type composite fibers or parallel type composite fibers made of polyethylene / polyester can be used.
[0052]
For fixing the front and back sheets 2, 21, 3, 22 and fixing the leak-proof cuff 6, fixing the body fluid absorbing sheets 4, 23a, 23b and the fiber assemblies 5, 25, and attaching the elastic members 10, 11, 12 A hot melt adhesive or heat welding means such as heat sealing or ultrasonic bonding can be used.
[0053]
These body fluid absorbing sheets 4, 23 a, and 23 b are liquid-absorbing pads that are used by attaching to a pants-type diaper or diaper cover in which the front and rear waist areas are connected in addition to the open diaper 1 and the sanitary napkin 20. It can also be used for body fluid absorbent articles such as . The body fluid absorbing sheet can also be used for body fluid absorbing articles such as hemostatic bandages, sweat absorbing sheets, and breast milk pads.
[0054]
【The invention's effect】
According to the body fluid absorbent sheet according to the present invention, it is a woven fabric or a knitted fabric made of blended yarn, and the blended yarns forming the body fluid absorbent sheet restrain each other's movement, so that the body fluid absorbent sheet itself loses its shape. firmly, in order to prevent their shape body fluid absorbent sheet, it is not necessary to use a member other than the body fluid absorbent sheets.
[0055]
In the body fluid absorbent articles such as disposable diapers and sanitary napkins using the body fluid absorbent sheets, or they are curved, even if the or kinked, fluid absorbent sheet also can be freely deformed according to the movement, the body fluid The movement of the diaper is not restricted by the absorbent sheet . In body fluid absorbent articles such as disposable diapers and sanitary napkins that use body fluid absorbent sheets , body fluid is absorbed and retained by the body fluid absorbent sheet , so that it does not revert to the top sheet, and is applied to the skin of the wearer. Attachment of body fluid can be prevented.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of a disposable diaper shown from the side of a top sheet.
FIG. 2 is a perspective view of a body fluid absorbing sheet .
FIG. 3 is a perspective view of a blended yarn forming a body fluid absorbing sheet .
FIG. 4 is an enlarged perspective view of a synthetic fiber shown as a single body.
FIG. 5 is a perspective view of a blended yarn shown as another example.
FIG. 6 is a partially broken perspective view of a sanitary napkin shown from the top sheet side.
FIG. 7 is a perspective view of a body fluid absorbing sheet .
FIG. 8 is a perspective view of a blended yarn forming a body fluid absorbing sheet .
[Explanation of symbols]
1 disposable diaper (body fluid absorbent article)
2 Liquid-permeable surface sheet 3 Liquid-impermeable back sheet 4 Body fluid absorbing sheet 7a, 7b Blended yarn (first blended yarn)
8 Synthetic fiber (first fiber material)
9 Recycled fiber (first fiber material)
18 Superabsorbent polymer particles (superabsorbent material)
20 sanitary napkin (body fluid absorbent article)
21 Liquid-permeable surface sheet 22 Liquid-impermeable back sheet 23a, 23b Body fluid absorbing sheet 25 Blended yarn (second blended yarn)
26 Synthetic fiber (second fiber material)
27 Superabsorbent fiber

Claims (11)

It is sandwiched between a liquid-permeable surface sheet positioned on the skin contact side and a liquid-impermeable back sheet positioned on the skin non-contact side, and constitutes a body fluid absorbent article together with the surface sheet and the back sheet. In the body fluid absorption sheet ,
The body fluid absorbent sheets, I either one der the cloth-like the knitting rarely been knitted textile or the first blended yarns which are woven into a net-like first blended yarn,
The first blended yarn is one in which superabsorbent polymer particles are bonded to the first fiber material,
The body fluid-absorbing sheet, wherein the first fiber material is made of synthetic fibers and / or regenerated fibers . The body fluid-absorbing sheet according to claim 1 , wherein the superabsorbent polymer particles are mixed in the first fiber material . The body fluid-absorbing sheet according to claim 1 or 2, wherein the superabsorbent polymer particles are fixed to a peripheral surface of the first fiber material using an adhesive. The bodily fluid absorption sheet according to claim 1 or 2, wherein the superabsorbent polymer particles are attached to the peripheral surface of the first fiber material by utilizing its own adhesiveness. The body fluid absorbing sheet according to any one of claims 1 to 4, wherein a content ratio of the superabsorbent polymer particles with respect to the first blended yarn is in a range of 30 to 60% by weight. It is sandwiched between a liquid-permeable surface sheet positioned on the skin contact side and a liquid-impermeable back sheet positioned on the skin non-contact side, and constitutes a body fluid absorbent article together with the surface sheet and the back sheet. In the body fluid absorption sheet,
The body fluid absorbent sheets, I either one der the cloth-like the knitting rarely been knitted textile or the second blended yarns which are woven into a net-like in the second blended yarn,
The second blended yarn is a blend of a second fiber material and a superabsorbent fiber,
The second fiber material comprises synthetic fibers and / or regenerated fibers;
The body fluid-absorbing sheet, wherein the highly water-absorbing fiber is obtained by spinning a highly water-absorbing polymer . The body fluid according to claim 6, wherein a blending rate of the superabsorbent fiber with respect to the second blended yarn is in a range of 30 to 50% by weight, and a fineness of the superabsorbent fiber is in a range of 1.5 to 100 dtex. Absorption sheet . The fineness of the first and second fiber materials is in the range of 1.5 to 100 dtex, and the number of fibers in the first and second blended yarns is in the range of 20 to 800. The bodily fluid absorption sheet in any one. The synthetic fiber is formed from at least one of polyolefin fiber, polyester fiber, and polyamide fiber, and the regenerated fiber is formed from cellulosic fiber. The bodily fluid absorption sheet of description. The liquid-permeable surface sheet positioned on the skin contact side, the liquid-impervious back sheet positioned on the skin non-contact side, and any one of claims 1 to 9 interposed between the surface sheet and the back sheet. A bodily fluid absorbent article comprising the bodily fluid absorbent sheet described in 1 . The bodily fluid absorbent article according to claim 10, comprising at least two layers of the bodily fluid absorbing sheet overlapping in the thickness direction .

Images